/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/Views/List/ObjectMixerEditorList.h
Represents the collections the user has selected in the UI. If empty, "All" is considered as selected.
const [TSet](API\Runtime\Core\Containers\TSet)< [FName](API\Runtime\Core\UObject\FName) > & GetSelectedCollections() const